# Heat Affects Crop Ratings

> US corn good-to-excellent ratings were 72% but slipped below 2014 and 2016 levels, with declines in Missouri, Kansas, and Michigan due to dryness and heat. Soybean ratings were mostly unchanged in top states but fell in the northeast and southwest Midwest. Ratings remain high by historical standards.

- Date: 2018-07-17 · published 2018-07-17T12:00:00.000Z
- Category: weather · region US · magnitude medium
- Page: https://feedsoft.ai/events/63866-heat-affects-crop-ratings
- Commodities: [Corn](https://feedsoft.ai/c/CORN.md), [Soybeans](https://feedsoft.ai/c/SOY.md)

## Why it matters

Localized dryness and heat trim expectations of the US crop, adding modest support to corn and soybean prices and feed costs.

## Read by commodity

- SOY: bullish ▲
- CORN: bullish ▲

## Linked price moves

| Commodity | Date | Window | Change % | z-score | Why linked |
| --- | --- | --- | --- | --- | --- |
| CORN | 2018-07-19 | 5 | +5.5% | 2.9 | Commentary on heat and dryness lowering corn ratings in Missouri, Kansas and Michigan reinforces the weather-driven supply concern. |

## Similar past events

| Commodity | Date | Event | 5-day % | 20-day % |
| --- | --- | --- | --- | --- |
| CORN | 2018-02-27 | [U.S. grains: Wheat hits seven-month high on crop ratings - Grainews](https://feedsoft.ai/events/12433-u-s-grains-wheat-hits-seven-month-high-on-crop-ratings-grainews.md) | +1.6% | +2.4% |
| CORN | 2025-06-01 | [Effects of Heat Stress on Corn](https://feedsoft.ai/events/13092-effects-of-heat-stress-on-corn.md) | +0.5% | -2.2% |
| CORN | 2021-12-16 | [Featured \| Dry weather affects Rio Grande do Sul's crop](https://feedsoft.ai/events/13756-featured-dry-weather-affects-rio-grande-do-sul-s-crop.md) | -2.7% | +0.4% |
| CORN | 2023-03-08 | [Drought affects crops in Rio Grande do Sul](https://feedsoft.ai/events/13658-drought-affects-crops-in-rio-grande-do-sul.md) | -1.6% | -0.6% |
| CORN | 2023-07-27 | [How Extreme Heat Can Affect Corn Yield](https://feedsoft.ai/events/13265-how-extreme-heat-can-affect-corn-yield.md) | -13.2% | -14.2% |
| SOY | 2018-02-27 | [U.S. grains: Wheat hits seven-month high on crop ratings - Grainews](https://feedsoft.ai/events/12433-u-s-grains-wheat-hits-seven-month-high-on-crop-ratings-grainews.md) | +3.1% | -0.8% |
| SOY | 2021-12-16 | [Featured \| Dry weather affects Rio Grande do Sul's crop](https://feedsoft.ai/events/13756-featured-dry-weather-affects-rio-grande-do-sul-s-crop.md) | +5.2% | +8.1% |
| SOY | 2023-03-08 | [Drought affects crops in Rio Grande do Sul](https://feedsoft.ai/events/13658-drought-affects-crops-in-rio-grande-do-sul.md) | -1.7% | -0.5% |

## Sources

- dtnpf.com: https://www.dtnpf.com/agriculture/web/AG/blogs/ag-weather-forum/blog-post/2018/07/17/heat-affects-crop-ratings-2

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Data from Feedsoft AI (https://feedsoft.ai/). For information only; not investment advice.